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Next: <a href="New_002darray-Execute-Functions.html#New_002darray-Execute-Functions" accesskey="n" rel="next">New-array Execute Functions</a>, Previous: <a href="Advanced-Interface.html#Advanced-Interface" accesskey="p" rel="prev">Advanced Interface</a>, Up: <a href="FFTW-Reference.html#FFTW-Reference" accesskey="u" rel="up">FFTW Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Guru-Interface-1"></a>
<h3 class="section">4.5 Guru Interface</h3>
<a name="index-guru-interface-2"></a>

<p>The &ldquo;guru&rdquo; interface to FFTW is intended to expose as much as possible
of the flexibility in the underlying FFTW architecture.  It allows one
to compute multi-dimensional &ldquo;vectors&rdquo; (loops) of multi-dimensional
transforms, where each vector/transform dimension has an independent
size and stride.
<a name="index-vector"></a>
One can also use more general complex-number formats, e.g. separate real
and imaginary arrays.
</p>
<p>For those users who require the flexibility of the guru interface, it is
important that they pay special attention to the documentation lest they
shoot themselves in the foot.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="Interleaved-and-split-arrays.html#Interleaved-and-split-arrays" accesskey="1">Interleaved and split arrays</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Guru-vector-and-transform-sizes.html#Guru-vector-and-transform-sizes" accesskey="2">Guru vector and transform sizes</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Guru-Complex-DFTs.html#Guru-Complex-DFTs" accesskey="3">Guru Complex DFTs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Guru-Real_002ddata-DFTs.html#Guru-Real_002ddata-DFTs" accesskey="4">Guru Real-data DFTs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Guru-Real_002dto_002dreal-Transforms.html#Guru-Real_002dto_002dreal-Transforms" accesskey="5">Guru Real-to-real Transforms</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="64_002dbit-Guru-Interface.html#g_t64_002dbit-Guru-Interface" accesskey="6">64-bit Guru Interface</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
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